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| author | Pavel Skripkin <paskripkin@gmail.com> | 2021-07-09 17:24:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-25 15:35:15 +0300 |
| commit | 2b70ca92847c619d6264c7372ef74fcbfd1e048c (patch) | |
| tree | 49664c01bcc7bccb2e6fdad4c22a1bd1eeae8b3d | |
| parent | 463c0addb4eb10a65a92bc7d5facba32f34b66d5 (diff) | |
| download | linux-2b70ca92847c619d6264c7372ef74fcbfd1e048c.tar.xz | |
net: qcom/emac: fix UAF in emac_remove
commit ad297cd2db8953e2202970e9504cab247b6c7cb4 upstream.
adpt is netdev private data and it cannot be
used after free_netdev() call. Using adpt after free_netdev()
can cause UAF bug. Fix it by moving free_netdev() at the end of the
function.
Fixes: 54e19bc74f33 ("net: qcom/emac: do not use devm on internal phy pdev")
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/ethernet/qualcomm/emac/emac.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/ethernet/qualcomm/emac/emac.c b/drivers/net/ethernet/qualcomm/emac/emac.c index 3eee8df359a1..5c199d2516d4 100644 --- a/drivers/net/ethernet/qualcomm/emac/emac.c +++ b/drivers/net/ethernet/qualcomm/emac/emac.c @@ -745,12 +745,13 @@ static int emac_remove(struct platform_device *pdev) put_device(&adpt->phydev->mdio.dev); mdiobus_unregister(adpt->mii_bus); - free_netdev(netdev); if (adpt->phy.digital) iounmap(adpt->phy.digital); iounmap(adpt->phy.base); + free_netdev(netdev); + return 0; } |